To study population-level trends (ecological design) rather than individual data points.
However, if you are looking for a guide on (which include sheathing and sealing) or managing ZIP file packages in a developer context, both are common technical topics associated with those terms. Below are guides for both interpretations. 1. Research Perspective: The "272 Zip Codes" Dataset Jb 272zip
Researchers use this specific set of 272 zip codes in Los Angeles to analyze social services, housing availability, and neighborhood demographics. Jb 272zip
Used to categorize neighborhoods into "ethnic enclaves" or "ethnoburbs" based on relative indicators like average income or ethnicity. Jb 272zip